/*

 * Copyright (c) 2017, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*

 * @test

 * @summary Class p1.c1 in module first_mod cannot read p2.c2 in module second_mod,

 *          even after a read edge is added between first_mod and second_mod.

 *          Ensures constant access check answers when not accessible due to readability.

 * @library /test/lib

 * @modules java.base/jdk.internal.misc

 * @modules java.base/jdk.internal.module

 * @compile p2/c2.java

 * @compile p1/c1.java

 * @compile p4/c4.java

 * @run main/othervm AccessReadTwice

 */

import static jdk.test.lib.Asserts.*;

import java.lang.module.Configuration;

import java.lang.module.ModuleDescriptor;

import java.lang.module.ModuleFinder;

import java.util.HashMap;

import java.util.Map;

import java.util.Set;

//

// ClassLoader1 --> defines first_mod --> packages p1, p4

//                  defines second_mod --> package p2

//

// package p2 in second_mod is exported to first_mod

//

// class p1.c1 defined in first_mod tries to access p2.c2 defined in second_mod

// Access is not allowed, even after a read edge is added between first_mod and second_mod.

public class AccessReadTwice {

    // Define modules within this layer to test access between

    // publicly defined classes within packages of those modules.

    public void createLayerOnBoot() throws Throwable {

        // Define module:     first_mod

        // Can read:          java.base

        // Packages:          p1, p4

        // Packages exported: none

        ModuleDescriptor descriptor_first_mod =

                ModuleDescriptor.newModule("first_mod")

                        .requires("java.base")

                        .packages(Set.of("p1", "p4"))

                        .build();

        // Define module:     second_mod

        // Can read:          java.base

        // Packages:          p2

        // Packages exported: p2 is exported to first_mod

        ModuleDescriptor descriptor_second_mod =

                ModuleDescriptor.newModule("second_mod")

                        .requires("java.base")

                        .exports("p2", Set.of("first_mod"))

                        .build();

        // Set up a ModuleFinder containing all modules for this layer

        ModuleFinder finder = ModuleLibrary.of(descriptor_first_mod, descriptor_second_mod);

        // Resolves "first_mod" and "second_mod"

                .configuration()

                .resolve(finder, ModuleFinder.of(), Set.of("first_mod", "second_mod"));

        // Map each module to this class loader

        Map<String, ClassLoader> map = new HashMap<>();

        ClassLoader loader = AccessReadTwice.class.getClassLoader();

        map.put("first_mod", loader);

        map.put("second_mod", loader);

        assertTrue(layer.findLoader("first_mod") == loader);

        assertTrue(layer.findLoader("second_mod") == loader);

        assertTrue(layer.findLoader("java.base") == null);

        Class p2_c2_class = loader.loadClass("p2.c2");

        Class p1_c1_class = loader.loadClass("p1.c1");

        Class p4_c4_class = loader.loadClass("p4.c4");

        Module first_mod = p1_c1_class.getModule();

        Module second_mod = p2_c2_class.getModule();

        // Export first_mod/p1 and first_mod/p4 to all unnamed modules so that

        // this test can use them

        jdk.internal.module.Modules.addExportsToAllUnnamed(first_mod, "p1");

        jdk.internal.module.Modules.addExportsToAllUnnamed(first_mod, "p4");

        // First access check for p1.c1

        try {

            p1_c1_class.newInstance();

            throw new RuntimeException("Test Failed, module first_mod should not have access to p2.c2");

        } catch (IllegalAccessError e) {

            String message = e.getMessage();

            if (!(message.contains("cannot access") &&

                  message.contains("because module first_mod does not read module second_mod"))) {

                throw new RuntimeException("Wrong message: " + message);

            } else {

                System.out.println("Test Succeeded at attempt #1");

            }

        }

        // Add a read edge from p4/c4's module (first_mod) to second_mod

        p4.c4 c4_obj = new p4.c4();

        c4_obj.addReads(second_mod);

        // Second access check for p1.c1, should have same result as first

        try {

            p1_c1_class.newInstance();

            throw new RuntimeException("Test Failed, access should have been cached above");

        } catch (IllegalAccessError e) {

            String message = e.getMessage();

            if (!(message.contains("cannot access") &&

                  message.contains("because module first_mod does not read module second_mod"))) {

                throw new RuntimeException("Wrong message: " + message);

            } else {

                System.out.println("Test Succeeded at attempt #2");

            }

        }

    }

    public static void main(String args[]) throws Throwable {

      AccessReadTwice test = new AccessReadTwice();

      test.createLayerOnBoot();

    }

}